DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Basal cell carcinoma (rodent ulcer) on a man's face. Basal cell carcinoma is the most common type of skin cancer, most frequently occurring on the head & face. This slow-growing cancer is related to long term, chronic exposure to the sun's ultraviolet radiation; agricultural and construction workers are most at risk. Due to their relatively benign nature, basal cell cancers may be successfully treated if diagnosed and removed before secondary complications - the destruction of underlying muscle & bone - may occur.
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